 The three largest ethnic groups reported in Gursum were the Oromo (81.32%), the Somali (15.5%), and the Amhara (2.71%); all other ethnic groups made up 0.47% of the population.Oromiffa was spoken as a first language by 67.87%, 28.8% spoke Somali, and 3.01% spoke Amharic; the remaining 0.32% spoke all other primary languages reported.The majority of the inhabitants were Muslim, with 96.8% of the population having reported they practiced that belief, while 2.92% of the population said they professed Ethiopian Orthodox Christianity.